This therapy uses an instrument that creates a rapid vibration that is meant to penetrate the tissues (muscles, tendons, etc.) and break up adhesions and scar tissue that may have developed after injuries, large and small, or just developed over time.  It is not simple massage, although it does have some of the effects of massage, but it's aim is to restore proper function of the muscles and tendons, and therefore, the function of the shoulder, hip, knee, elbow or other part of the body.